{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["process characterization", "process parameter", "concept or principle"], "input": "Direct Metal Laser Sintering ( DMLS ) – is similar to SLS with some differences ."}
{"process characterization": [], "process parameter": [], "concept or principle": []}